private static RsaKeyHelper TryResolvePrivateKeyWithNoFormatDeclare(string keyString, RsaKeyHelper.KeyFormat format)
{
try
{
string pkcs1 = RsaKeyHelper.FormatPrivateKey(keyString, format);
var helper = RsaKeyHelper.FromPemKeyString(pkcs1);
helper.RSACryptoServiceProvider();
return(helper);
}
catch (Exception ex)
{
return(null);
}
}
/// <summary>
///
/// </summary>
/// <param name="keyString">密钥字符串</param>
/// <exception cref="InvalidKeyFormatException"></exception>
/// <returns></returns>
public static PemCertificate ReadFromKeyString(string keyString)
{
PemCertificate pemcert = new PemCertificate();
RsaKeyHelper helper = null;
if (keyString.StartsWith("-----"))
{
helper = RsaKeyHelper.FromPemKeyString(keyString);
}
else
{
//纯密钥文本，不带声明格式
keyString = keyString.Replace("\r", "").Replace("\n", "");
if (Convert.FromBase64String(keyString).Length < 400)
{
keyString = RsaKeyHelper.FormatPublicKey(keyString);
helper = RsaKeyHelper.FromPemKeyString(keyString);
}
else
{
helper = TryResolvePrivateKeyWithNoFormatDeclare(keyString, RsaKeyHelper.KeyFormat.pkcs1) ??
TryResolvePrivateKeyWithNoFormatDeclare(keyString, RsaKeyHelper.KeyFormat.pkcs8);
}
}
if (helper == null)
{
throw new InvalidKeyFormatException("无法识别的PEM密钥格式");
}
pemcert._provider = helper.RSACryptoServiceProvider();
return(pemcert);
//byte[] res = null;
//string type = pem.StartsWith(PEM_PRIVATE_KEY_HEADER) ? "RSA PRIVATE KEY" : pem.StartsWith(PEM_PUBLIC_KEY_HEADER) ? "PUBLIC KEY" : "PLAIN TEXT";
//if (type == "PLAIN TEXT")
//{
// res = Convert.FromBase64String(pem);
//}
//else
//{
// byte[] data = Encoding.UTF8.GetBytes(pem);
// res = GetPem(type, data);
//}
//if (type.Equals("RSA PRIVATE KEY"))//私钥
//{
// pemcert._provider = DecodeRSAPrivateKey(res);
//}
//else if (type.Equals("PUBLIC KEY"))
//{
// pemcert._provider = DecodeX509PublicKey(res);
//}
//else if (type.Equals("PLAIN TEXT"))
//{
// if (res.Length == 608 || res.Length == 611 || res.Length == 1193) //PKCS#1 PRIVATE KEY,keysize=1024,bytes=608
// {
// pemcert._provider = DecodeRSAPrivateKey(res);
// }
// else if (res.Length == 634 || res.Length == 635 || res.Length == 1217 || res.Length == 1218)//ASN.1 PRIVATE KEY
// {
// pemcert._provider = DecodeASN1PrivateKey(res);
// }
// else
// {
// pemcert._provider = DecodeX509PublicKey(res);
// if (pemcert._provider == null)
// {
// pemcert._provider = DecodeRSAPrivateKey(res);
// if (pemcert._provider == null)
// {
// pemcert._provider = DecodeASN1PrivateKey(res);
// }
// }
// }
//}
//return pemcert;
}
